H-beam composite pile



E. D. WATT H-BEAM COMPOSITE PILE May 14,` 1940.

Filed July 14, 1937 2 Sheets-Shea?I 1 May 14, 1940 l E. D. WAI-r1'2,200,524

HfBEAM COMPOSITE PILE Filed July 14, 1937 `2 Sheets-Sheet 2 'ATTORNEYSPatented May 14, 1940 UNITED STATES PATENT OFFICE H-BEAM CODIPOSITE PILEApplication July 14, 1937, Serial No. 153,471

3 Claims.

This invention pertains to the manufacture of composite piles having anH-beam lower section and a concrete upper section, as set forth in thecopending application of Maxwell M. Upson, Serial No. 143,911, filed May21, 1937, now Patent No. 2,168,459, granted August 8, 1939. One of theproblems in the driving o-f such piles is the provision of a sealsuiiiciently tight to completely prevent entrance of ground water pastthe H-beam into the shell, and an object of this invention is todisclose such a seal.

Further and other objects and advantages will be apparent from thespecification and claims, and from the accompanying drawings which i1-lustrate what is now considered the preferred embodiment of theinvention.

Fig. 1 is a cross-section of a drive boot with shell coupler attached.

Fig. 2 is a View on line 2--2 of Fig. l showing the bottom surface ofthe boot slotted to pass over the H-beam.

Fig. 3 shows the boot in driving position around the upper part of theHbeam, the boot being filled with concrete, and the lowest shell sectionbeing attached ready to receive the drive core.

Fig. 4 is a view similar to Fig. 3 after the drive core is in position,the View of boot and H-beam being on line 4-4 of Fig. 3.

Fig. 5 is a view on line 5-5 of Fig. 4.

Fig. 6 is a view (similar to Fig. 4), of the drive core being removedafter the H-beam and shell have been driven.l

Fig. 7 is a View of Fig. 6 after removal of the core and filling of theshell with concrete.

In the practice of the invention, a sheet metal boot I is provided(Figs. 1 and 2) slotted on its bottom surface as at I2 in order to slipover the H-beam I6 which is to form the lower section of the compositepile. A screw-threaded corrugated shell coupling member I4 is usuallywelded to the upper rim of the boot. The boot is slipped over the upperend of the H-beam and is then filled with concrete I8 to a depth whichwill leave a sufiicient portion of the H-beam above concrete I8 to entera recess in the lower end of the drive core for maintaining beam andcore in alignment during driving. Fig. 3 shows this stage of theoperation, with the lowest shell section 20 screwed tightly intocoupling I4. It will be clear that no water can enter shell 20 aroundthe H-beam and through the boot, especially if the driving occurs whilethe concrete is plastic and in a compressible condition.

Next, the drive core 22 is lowered through shell 20 (Fig. 4) to drivingposition. During the driving operation it is desired to have the drivecore rest on the top of the H-beam and also on the entire upper surfaceof concrete I8. To permit this condition an H-shaped recess is providedin the bottom of the core similar in cross-section to H-slot I2 inFig. 1. expensive operation to cut such a slotted recess in the coreitself, the ysame result is accomplished by boring a cylindrical recessin the bottom of the core and then inserting in that cylindrical recessa plug, usually a casting, having a cylindrical outer surface and acored central recess to t the H-beam. Such an arrangement is shown inFigs. 4 and 5, 22 being the drive core, and 24 being the plug slotted asat 26. The plug may be keyed to the core as by a pin 28.

After driving, core 22 and plug 24 are removed as indicated in Fig. 6and then the shell is filled with concrete 30, as in Fig. '7, to formthe finished structure.

It is to be understood that the invention is not limited to the specificembodiment herein illustrated and described, but may be used in otherways without departure from its spirit as defined by the followingclaims.

I claim:

l. In the method of forming va composite pile having a lower sectioncomprising a beam and an upper section comprising a shell filled withcon- L,

crete, the steps of placing the lower end of said shell around the upperend of said beam, placing a seal of concrete between said shell and saidbeam to preventI entrance of ground water into said shell during thesinking operation, sinking said shell and said beam into the groundsimultaneously by force which subjects the seal to a compression actionto effectively maintain said seal during the sinking operation, andfilling the shell with concrete.

2. In a composite pile, a preformed lower pile section, an upper pileshell attached to said lower section, and a compressible concrete sealbetween the lower pile section and said shell for preventing entrance ofground water into said shell during the sinking operation.

3. In a composite pile, a preformed lower pile section, a boot aroundthe upper end of said lower section, an upper pile shell attached tosaid Since it would be a very boot and extending upwardly therefrom, anda

